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<h1 class="title">freezetablewidget.cpp 示例文件</h1>
<span class="subtitle">itemviews/frozencolumn/freezetablewidget.cpp</span>
<!-- $$$itemviews/frozencolumn/freezetablewidget.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  ** information use the contact form at https://www.qt.io/contact-us.
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  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
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  ** modification, are permitted provided that the following conditions are
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  <span class="preprocessor">#include &quot;freezetablewidget.h&quot;</span>

  <span class="preprocessor">#include &lt;QScrollBar&gt;</span>
  <span class="preprocessor">#include &lt;QHeaderView&gt;</span>

  FreezeTableWidget<span class="operator">::</span>FreezeTableWidget(<span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span> model)
  {
        setModel(model);
        frozenTableView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtableview.html">QTableView</a></span>(<span class="keyword">this</span>);

        init();

        <span class="comment">//connect the headers and scrollbars of both tableviews together</span>
        connect(horizontalHeader()<span class="operator">,</span><span class="operator">&amp;</span><span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>sectionResized<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span>
                <span class="operator">&amp;</span>FreezeTableWidget<span class="operator">::</span>updateSectionWidth);
        connect(verticalHeader()<span class="operator">,</span><span class="operator">&amp;</span><span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>sectionResized<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span>
                <span class="operator">&amp;</span>FreezeTableWidget<span class="operator">::</span>updateSectionHeight);

        connect(frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>verticalScrollBar()<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qabstractslider.html">QAbstractSlider</a></span><span class="operator">::</span>valueChanged<span class="operator">,</span>
                verticalScrollBar()<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qabstractslider.html">QAbstractSlider</a></span><span class="operator">::</span>setValue);
        connect(verticalScrollBar()<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qabstractslider.html">QAbstractSlider</a></span><span class="operator">::</span>valueChanged<span class="operator">,</span>
                frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>verticalScrollBar()<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qabstractslider.html">QAbstractSlider</a></span><span class="operator">::</span>setValue);

  }

  FreezeTableWidget<span class="operator">::</span><span class="operator">~</span>FreezeTableWidget()
  {
        <span class="keyword">delete</span> frozenTableView;
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>init()
  {
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setModel(model());
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setFocusPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoFocus);
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>verticalHeader()<span class="operator">-</span><span class="operator">&gt;</span>hide();
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>horizontalHeader()<span class="operator">-</span><span class="operator">&gt;</span>setSectionResizeMode(<span class="type"><a href="qheaderview.html">QHeaderView</a></span><span class="operator">::</span>Fixed);

        viewport()<span class="operator">-</span><span class="operator">&gt;</span>stackUnder(frozenTableView);

        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setStyleSheet(<span class="string">&quot;QTableView { border: none;&quot;</span>
                                       <span class="string">&quot;background-color: #8EDE21;&quot;</span>
                                       <span class="string">&quot;selection-background-color: #999}&quot;</span>); <span class="comment">//for demo purposes</span>
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setSelectionModel(selectionModel());
        <span class="keyword">for</span> (<span class="type">int</span> col <span class="operator">=</span> <span class="number">1</span>; col <span class="operator">&lt;</span> model()<span class="operator">-</span><span class="operator">&gt;</span>columnCount(); <span class="operator">+</span><span class="operator">+</span>col)
              frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setColumnHidden(col<span class="operator">,</span> <span class="keyword">true</span>);

        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setColumnWidth(<span class="number">0</span><span class="operator">,</span> columnWidth(<span class="number">0</span>) );

        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setHorizontalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setVerticalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>show();

        updateFrozenTableGeometry();

        setHorizontalScrollMode(ScrollPerPixel);
        setVerticalScrollMode(ScrollPerPixel);
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setVerticalScrollMode(ScrollPerPixel);
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>updateSectionWidth(<span class="type">int</span> logicalIndex<span class="operator">,</span> <span class="type">int</span> <span class="comment">/* oldSize */</span><span class="operator">,</span> <span class="type">int</span> newSize)
  {
        <span class="keyword">if</span> (logicalIndex <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>){
              frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setColumnWidth(<span class="number">0</span><span class="operator">,</span> newSize);
              updateFrozenTableGeometry();
        }
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>updateSectionHeight(<span class="type">int</span> logicalIndex<span class="operator">,</span> <span class="type">int</span> <span class="comment">/* oldSize */</span><span class="operator">,</span> <span class="type">int</span> newSize)
  {
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setRowHeight(logicalIndex<span class="operator">,</span> newSize);
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>resizeEvent(<span class="type"><a href="../qtgui/qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span> event)
  {
        <span class="type"><a href="qtableview.html">QTableView</a></span><span class="operator">::</span>resizeEvent(event);
        updateFrozenTableGeometry();
   }

  <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> FreezeTableWidget<span class="operator">::</span>moveCursor(CursorAction cursorAction<span class="operator">,</span>
                                            <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>KeyboardModifiers modifiers)
  {
        <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> current <span class="operator">=</span> <span class="type"><a href="qtableview.html">QTableView</a></span><span class="operator">::</span>moveCursor(cursorAction<span class="operator">,</span> modifiers);

        <span class="keyword">if</span> (cursorAction <span class="operator">=</span><span class="operator">=</span> MoveLeft <span class="operator">&amp;</span><span class="operator">&amp;</span> current<span class="operator">.</span>column() <span class="operator">&gt;</span> <span class="number">0</span>
                <span class="operator">&amp;</span><span class="operator">&amp;</span> visualRect(current)<span class="operator">.</span>topLeft()<span class="operator">.</span>x() <span class="operator">&lt;</span> frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>columnWidth(<span class="number">0</span>) ){
              <span class="keyword">const</span> <span class="type">int</span> newValue <span class="operator">=</span> horizontalScrollBar()<span class="operator">-</span><span class="operator">&gt;</span>value() <span class="operator">+</span> visualRect(current)<span class="operator">.</span>topLeft()<span class="operator">.</span>x()
                                   <span class="operator">-</span> frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>columnWidth(<span class="number">0</span>);
              horizontalScrollBar()<span class="operator">-</span><span class="operator">&gt;</span>setValue(newValue);
        }
        <span class="keyword">return</span> current;
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>scrollTo (<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&amp;</span> index<span class="operator">,</span> ScrollHint hint){
      <span class="keyword">if</span> (index<span class="operator">.</span>column() <span class="operator">&gt;</span> <span class="number">0</span>)
          <span class="type"><a href="qtableview.html">QTableView</a></span><span class="operator">::</span>scrollTo(index<span class="operator">,</span> hint);
  }

  <span class="type">void</span> FreezeTableWidget<span class="operator">::</span>updateFrozenTableGeometry()
  {
        frozenTableView<span class="operator">-</span><span class="operator">&gt;</span>setGeometry(verticalHeader()<span class="operator">-</span><span class="operator">&gt;</span>width() <span class="operator">+</span> frameWidth()<span class="operator">,</span>
                                     frameWidth()<span class="operator">,</span> columnWidth(<span class="number">0</span>)<span class="operator">,</span>
                                     viewport()<span class="operator">-</span><span class="operator">&gt;</span>height()<span class="operator">+</span>horizontalHeader()<span class="operator">-</span><span class="operator">&gt;</span>height());
  }

</pre>
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<!-- @@@itemviews/frozencolumn/freezetablewidget.cpp -->
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